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Accept and handle emails sent with an empty 821.From / return-path as… (#561)

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* Accept and handle emails sent with an empty 821.From / return-path as it would any other email.
This commit is contained in:
Steve Atkins
2025-03-17 15:54:30 +00:00
committed by GitHub
parent 4c8c8e7744
commit 9904399d24
3 changed files with 13 additions and 15 deletions
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9
pkg/server/smtp/handler_test.go
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@@ -78,6 +78,11 @@ func TestGreetState(t *testing.T) {
}
}
// Messages sent with a null reverse-path are unusual,
// but valid. They are used for delivery status
// notifications, and also for some sorts of auto-responder
// as part of bounce storm mitigation.
// Sections 3.6.3 and 4.5.5 of RFC 5321 discuss them.
func TestEmptyEnvelope(t *testing.T) {
ds := test.NewStore()
server := setupSMTPServer(ds, extension.NewHost())
@@ -85,14 +90,14 @@ func TestEmptyEnvelope(t *testing.T) {
// Test out some empty envelope without blanks
script := []scriptStep{
{"HELO localhost", 250},
{"MAIL FROM:<>", 501},
{"MAIL FROM:<>", 250},
}
playSession(t, server, script)
// Test out some empty envelope with blanks
script = []scriptStep{
{"HELO localhost", 250},
{"MAIL FROM: <>", 501},
{"MAIL FROM: <>", 250},
}
playSession(t, server, script)
}